| http://www.w3.org/ns/prov#value | - a port for admitting and releasing air to and from said air mattress; means for adjusting the overall firmness of said air mattress by adjusting the amount of air in said air mattress; said adjusting means including a set of flexible walled balloons, conduit means for connecting in fluid communication each of said balloons with said port of said air mattress, and means for applying pressure to sai
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